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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright (c) 2009 Kathryn Huxtable and Kenneth Orr.</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * This file is part of the SeaGlass Pluggable Look and Feel.</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * Licensed under the Apache License, Version 2.0 (the "License");</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> * you may not use this file except in compliance with the License.</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> * You may obtain a copy of the License at</em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> *     <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> * See the License for the specific language governing permissions and</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <em class="jxr_comment"> * limitations under the License.</em>
<a class="jxr_linenumber" name="17" href="#17">17</a>  <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="18" href="#18">18</a>  <em class="jxr_comment"> * $Id: WindowUtils.java 1599 2011-08-14 19:38:59Z rosstauscher@gmx.de $</em>
<a class="jxr_linenumber" name="19" href="#19">19</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">package</strong> com.seaglasslookandfeel.util;
<a class="jxr_linenumber" name="21" href="#21">21</a>  
<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> java.awt.Component;
<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> java.awt.Shape;
<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> java.awt.Window;
<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> java.awt.event.WindowAdapter;
<a class="jxr_linenumber" name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> java.awt.event.WindowEvent;
<a class="jxr_linenumber" name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> java.awt.event.WindowFocusListener;
<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> java.awt.event.WindowListener;
<a class="jxr_linenumber" name="29" href="#29">29</a>  
<a class="jxr_linenumber" name="30" href="#30">30</a>  <strong class="jxr_keyword">import</strong> java.lang.ref.WeakReference;
<a class="jxr_linenumber" name="31" href="#31">31</a>  <strong class="jxr_keyword">import</strong> java.lang.reflect.Method;
<a class="jxr_linenumber" name="32" href="#32">32</a>  
<a class="jxr_linenumber" name="33" href="#33">33</a>  <strong class="jxr_keyword">import</strong> javax.swing.JComponent;
<a class="jxr_linenumber" name="34" href="#34">34</a>  <strong class="jxr_keyword">import</strong> javax.swing.SwingUtilities;
<a class="jxr_linenumber" name="35" href="#35">35</a>  <strong class="jxr_keyword">import</strong> javax.swing.UIManager;
<a class="jxr_linenumber" name="36" href="#36">36</a>  <strong class="jxr_keyword">import</strong> javax.swing.event.AncestorEvent;
<a class="jxr_linenumber" name="37" href="#37">37</a>  <strong class="jxr_keyword">import</strong> javax.swing.event.AncestorListener;
<a class="jxr_linenumber" name="38" href="#38">38</a>  
<a class="jxr_linenumber" name="39" href="#39">39</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="40" href="#40">40</a>  <em class="jxr_javadoccomment"> * Various utitilies used to manage window drawing.</em>
<a class="jxr_linenumber" name="41" href="#41">41</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="42" href="#42">42</a>  <em class="jxr_javadoccomment"> * @author Ken Orr</em>
<a class="jxr_linenumber" name="43" href="#43">43</a>  <em class="jxr_javadoccomment"> * @author Kathryn Huxtable</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="45" href="#45">45</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../com/seaglasslookandfeel/util/WindowUtils.html">WindowUtils</a> {
<a class="jxr_linenumber" name="46" href="#46">46</a>  
<a class="jxr_linenumber" name="47" href="#47">47</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="48" href="#48">48</a>  <em class="jxr_javadoccomment">     * Try's to make the given {@link Window} non-opqaue (transparent) across</em>
<a class="jxr_linenumber" name="49" href="#49">49</a>  <em class="jxr_javadoccomment">     * platforms and JREs. This method is not guaranteed to succeed, and will</em>
<a class="jxr_linenumber" name="50" href="#50">50</a>  <em class="jxr_javadoccomment">     * fail silently if the given {@code Window} cannot be made non-opaque.</em>
<a class="jxr_linenumber" name="51" href="#51">51</a>  <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="52" href="#52">52</a>  <em class="jxr_javadoccomment">     * &lt;p&gt;This method is useful, for example, when creating a HUD style window</em>
<a class="jxr_linenumber" name="53" href="#53">53</a>  <em class="jxr_javadoccomment">     * that is semi-transparent, and thus doesn't want the window background to</em>
<a class="jxr_linenumber" name="54" href="#54">54</a>  <em class="jxr_javadoccomment">     * be drawn.&lt;/p&gt;</em>
<a class="jxr_linenumber" name="55" href="#55">55</a>  <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="56" href="#56">56</a>  <em class="jxr_javadoccomment">     * @param window the {@code Window} to make non-opaque.</em>
<a class="jxr_linenumber" name="57" href="#57">57</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="58" href="#58">58</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> makeWindowNonOpaque(Window window) {
<a class="jxr_linenumber" name="59" href="#59">59</a>          <em class="jxr_comment">// on the mac, simply setting the window's background color to be fully</em>
<a class="jxr_linenumber" name="60" href="#60">60</a>          <em class="jxr_comment">// transparent makes the window non-opaque.</em>
<a class="jxr_linenumber" name="61" href="#61">61</a>  <em class="jxr_comment">//        window.setBackground(UIManager.getColor("seaGlassTransparent"));</em>
<a class="jxr_linenumber" name="62" href="#62">62</a>  
<a class="jxr_linenumber" name="63" href="#63">63</a>          <em class="jxr_comment">// on non-mac platforms, try to use the facilities of Java 6 update 10.</em>
<a class="jxr_linenumber" name="64" href="#64">64</a>          <strong class="jxr_keyword">if</strong> (!PlatformUtils.isMac()) {
<a class="jxr_linenumber" name="65" href="#65">65</a>              quietlyTryToMakeWindowNonOqaque(window);
<a class="jxr_linenumber" name="66" href="#66">66</a>          } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="67" href="#67">67</a>              window.setBackground(UIManager.getColor(<span class="jxr_string">"seaGlassTransparent"</span>));
<a class="jxr_linenumber" name="68" href="#68">68</a>          }
<a class="jxr_linenumber" name="69" href="#69">69</a>      }
<a class="jxr_linenumber" name="70" href="#70">70</a>      
<a class="jxr_linenumber" name="71" href="#71">71</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="72" href="#72">72</a>  <em class="jxr_javadoccomment">     * Sets the shape of a window.</em>
<a class="jxr_linenumber" name="73" href="#73">73</a>  <em class="jxr_javadoccomment">     * This will be done via a com.sun API and may be not available on all platforms.</em>
<a class="jxr_linenumber" name="74" href="#74">74</a>  <em class="jxr_javadoccomment">     * @param window to change the shape for </em>
<a class="jxr_linenumber" name="75" href="#75">75</a>  <em class="jxr_javadoccomment">     * @param s the new shape for the window.</em>
<a class="jxr_linenumber" name="76" href="#76">76</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="77" href="#77">77</a>  
<a class="jxr_linenumber" name="78" href="#78">78</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> setWindowShape(Window window, Shape s) {
<a class="jxr_linenumber" name="79" href="#79">79</a>          <strong class="jxr_keyword">if</strong> (PlatformUtils.isJava6()) {
<a class="jxr_linenumber" name="80" href="#80">80</a>              setWindowShapeJava6(window, s);
<a class="jxr_linenumber" name="81" href="#81">81</a>          } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="82" href="#82">82</a>              setWindowShapeJava7(window, s);
<a class="jxr_linenumber" name="83" href="#83">83</a>          }
<a class="jxr_linenumber" name="84" href="#84">84</a>      }
<a class="jxr_linenumber" name="85" href="#85">85</a>  
<a class="jxr_linenumber" name="86" href="#86">86</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="87" href="#87">87</a>  <em class="jxr_javadoccomment">     * @param window</em>
<a class="jxr_linenumber" name="88" href="#88">88</a>  <em class="jxr_javadoccomment">     * @param s</em>
<a class="jxr_linenumber" name="89" href="#89">89</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="90" href="#90">90</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> setWindowShapeJava7(Window window, Shape s) {
<a class="jxr_linenumber" name="91" href="#91">91</a>          <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="92" href="#92">92</a>              Class  clazz  = window.getClass();
<a class="jxr_linenumber" name="93" href="#93">93</a>              Method method = clazz.getMethod(<span class="jxr_string">"setShape"</span>, Shape.<strong class="jxr_keyword">class</strong>);
<a class="jxr_linenumber" name="94" href="#94">94</a>              method.invoke(window, s);
<a class="jxr_linenumber" name="95" href="#95">95</a>          } <strong class="jxr_keyword">catch</strong> (Exception e) {
<a class="jxr_linenumber" name="96" href="#96">96</a>              <em class="jxr_comment">// silently ignore this exception.</em>
<a class="jxr_linenumber" name="97" href="#97">97</a>          }
<a class="jxr_linenumber" name="98" href="#98">98</a>      }
<a class="jxr_linenumber" name="99" href="#99">99</a>      
<a class="jxr_linenumber" name="100" href="#100">100</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="101" href="#101">101</a> <em class="jxr_javadoccomment">     * @param window</em>
<a class="jxr_linenumber" name="102" href="#102">102</a> <em class="jxr_javadoccomment">     * @param s</em>
<a class="jxr_linenumber" name="103" href="#103">103</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="104" href="#104">104</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> setWindowShapeJava6(Window window, Shape s) {
<a class="jxr_linenumber" name="105" href="#105">105</a>         <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="106" href="#106">106</a>             Class  clazz  = Class.forName(<span class="jxr_string">"com.sun.awt.AWTUtilities"</span>);
<a class="jxr_linenumber" name="107" href="#107">107</a>             Method method = clazz.getMethod(<span class="jxr_string">"setWindowShape"</span>, java.awt.Window.<strong class="jxr_keyword">class</strong>, Shape.<strong class="jxr_keyword">class</strong>);
<a class="jxr_linenumber" name="108" href="#108">108</a>             method.invoke(clazz, window, s);
<a class="jxr_linenumber" name="109" href="#109">109</a>         } <strong class="jxr_keyword">catch</strong> (Exception e) {
<a class="jxr_linenumber" name="110" href="#110">110</a>             <em class="jxr_comment">// silently ignore this exception.</em>
<a class="jxr_linenumber" name="111" href="#111">111</a>         }
<a class="jxr_linenumber" name="112" href="#112">112</a>     }
<a class="jxr_linenumber" name="113" href="#113">113</a> 
<a class="jxr_linenumber" name="114" href="#114">114</a> 
<a class="jxr_linenumber" name="115" href="#115">115</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="116" href="#116">116</a> <em class="jxr_javadoccomment">     * Trys to invoke</em>
<a class="jxr_linenumber" name="117" href="#117">117</a> <em class="jxr_javadoccomment">     * {@code com.sun.awt.AWTUtilities.setWindowOpaque(window,false)} on the</em>
<a class="jxr_linenumber" name="118" href="#118">118</a> <em class="jxr_javadoccomment">     * given {@link Window}. This will only work when running with JRE 6 update</em>
<a class="jxr_linenumber" name="119" href="#119">119</a> <em class="jxr_javadoccomment">     * 10 or higher. This method will silently fail if the method cannot be</em>
<a class="jxr_linenumber" name="120" href="#120">120</a> <em class="jxr_javadoccomment">     * invoked.</em>
<a class="jxr_linenumber" name="121" href="#121">121</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="122" href="#122">122</a> <em class="jxr_javadoccomment">     * @param window the {@code Window} to try and make non-opaque.</em>
<a class="jxr_linenumber" name="123" href="#123">123</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="124" href="#124">124</a>     @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a class="jxr_linenumber" name="125" href="#125">125</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> quietlyTryToMakeWindowNonOqaque(Window window) {
<a class="jxr_linenumber" name="126" href="#126">126</a>         <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="127" href="#127">127</a>             Class  clazz  = Class.forName(<span class="jxr_string">"com.sun.awt.AWTUtilities"</span>);
<a class="jxr_linenumber" name="128" href="#128">128</a>             Method method = clazz.getMethod(<span class="jxr_string">"setWindowOpaque"</span>, java.awt.Window.<strong class="jxr_keyword">class</strong>, Boolean.TYPE);
<a class="jxr_linenumber" name="129" href="#129">129</a> 
<a class="jxr_linenumber" name="130" href="#130">130</a>             method.invoke(clazz, window, false);
<a class="jxr_linenumber" name="131" href="#131">131</a>         } <strong class="jxr_keyword">catch</strong> (Exception e) {
<a class="jxr_linenumber" name="132" href="#132">132</a>             <em class="jxr_comment">// silently ignore this exception.</em>
<a class="jxr_linenumber" name="133" href="#133">133</a>         }
<a class="jxr_linenumber" name="134" href="#134">134</a>     }
<a class="jxr_linenumber" name="135" href="#135">135</a> 
<a class="jxr_linenumber" name="136" href="#136">136</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="137" href="#137">137</a> <em class="jxr_javadoccomment">     * Create and install the repaint window focus listener.</em>
<a class="jxr_linenumber" name="138" href="#138">138</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="139" href="#139">139</a> <em class="jxr_javadoccomment">     * @param  window the window.</em>
<a class="jxr_linenumber" name="140" href="#140">140</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="141" href="#141">141</a> <em class="jxr_javadoccomment">     * @return the listener.</em>
<a class="jxr_linenumber" name="142" href="#142">142</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="143" href="#143">143</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> WindowFocusListener createAndInstallRepaintWindowFocusListener(Window window) {
<a class="jxr_linenumber" name="144" href="#144">144</a>         <em class="jxr_comment">// create a WindowFocusListener that repaints the window on focus</em>
<a class="jxr_linenumber" name="145" href="#145">145</a>         <em class="jxr_comment">// changes.</em>
<a class="jxr_linenumber" name="146" href="#146">146</a>         WindowFocusListener windowFocusListener = <strong class="jxr_keyword">new</strong> WindowFocusListener() {
<a class="jxr_linenumber" name="147" href="#147">147</a>             <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> windowGainedFocus(WindowEvent e) {
<a class="jxr_linenumber" name="148" href="#148">148</a>                 e.getWindow().repaint();
<a class="jxr_linenumber" name="149" href="#149">149</a>             }
<a class="jxr_linenumber" name="150" href="#150">150</a> 
<a class="jxr_linenumber" name="151" href="#151">151</a>             <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> windowLostFocus(WindowEvent e) {
<a class="jxr_linenumber" name="152" href="#152">152</a>                 e.getWindow().repaint();
<a class="jxr_linenumber" name="153" href="#153">153</a>             }
<a class="jxr_linenumber" name="154" href="#154">154</a>         };
<a class="jxr_linenumber" name="155" href="#155">155</a> 
<a class="jxr_linenumber" name="156" href="#156">156</a>         window.addWindowFocusListener(windowFocusListener);
<a class="jxr_linenumber" name="157" href="#157">157</a> 
<a class="jxr_linenumber" name="158" href="#158">158</a>         <strong class="jxr_keyword">return</strong> windowFocusListener;
<a class="jxr_linenumber" name="159" href="#159">159</a>     }
<a class="jxr_linenumber" name="160" href="#160">160</a> 
<a class="jxr_linenumber" name="161" href="#161">161</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="162" href="#162">162</a> <em class="jxr_javadoccomment">     * {@code true} if the given {@link Component}'s parent {@link Window} is</em>
<a class="jxr_linenumber" name="163" href="#163">163</a> <em class="jxr_javadoccomment">     * currently active (focused).</em>
<a class="jxr_linenumber" name="164" href="#164">164</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="165" href="#165">165</a> <em class="jxr_javadoccomment">     * @param  component the {@code Component} to check the parent</em>
<a class="jxr_linenumber" name="166" href="#166">166</a> <em class="jxr_javadoccomment">     *                   {@code Window}'s focus for.</em>
<a class="jxr_linenumber" name="167" href="#167">167</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="168" href="#168">168</a> <em class="jxr_javadoccomment">     * @return {@code true} if the given {@code Component}'s parent</em>
<a class="jxr_linenumber" name="169" href="#169">169</a> <em class="jxr_javadoccomment">     *         {@code Window} is currently active.</em>
<a class="jxr_linenumber" name="170" href="#170">170</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="171" href="#171">171</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">boolean</strong> isParentWindowFocused(Component component) {
<a class="jxr_linenumber" name="172" href="#172">172</a>         Window window = SwingUtilities.getWindowAncestor(component);
<a class="jxr_linenumber" name="173" href="#173">173</a> 
<a class="jxr_linenumber" name="174" href="#174">174</a>         <strong class="jxr_keyword">return</strong> window != <strong class="jxr_keyword">null</strong> &amp;&amp; window.isFocused();
<a class="jxr_linenumber" name="175" href="#175">175</a>     }
<a class="jxr_linenumber" name="176" href="#176">176</a> 
<a class="jxr_linenumber" name="177" href="#177">177</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="178" href="#178">178</a> <em class="jxr_javadoccomment">     * Installs a {@link WindowFocusListener} on the given {@link JComponent}'s</em>
<a class="jxr_linenumber" name="179" href="#179">179</a> <em class="jxr_javadoccomment">     * parent {@link Window}. If the {@code JComponent} doesn't yet have a</em>
<a class="jxr_linenumber" name="180" href="#180">180</a> <em class="jxr_javadoccomment">     * parent, then the listener will be installed when the component is added</em>
<a class="jxr_linenumber" name="181" href="#181">181</a> <em class="jxr_javadoccomment">     * to a container.</em>
<a class="jxr_linenumber" name="182" href="#182">182</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="183" href="#183">183</a> <em class="jxr_javadoccomment">     * @param component     the component who's parent frame to listen to focus</em>
<a class="jxr_linenumber" name="184" href="#184">184</a> <em class="jxr_javadoccomment">     *                      changes on.</em>
<a class="jxr_linenumber" name="185" href="#185">185</a> <em class="jxr_javadoccomment">     * @param focusListener the {@code WindowFocusListener} to notify when focus</em>
<a class="jxr_linenumber" name="186" href="#186">186</a> <em class="jxr_javadoccomment">     *                      changes.</em>
<a class="jxr_linenumber" name="187" href="#187">187</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="188" href="#188">188</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> installWeakWindowFocusListener(JComponent component, WindowFocusListener focusListener) {
<a class="jxr_linenumber" name="189" href="#189">189</a>         WindowListener   weakFocusListener = createWeakWindowFocusListener(focusListener);
<a class="jxr_linenumber" name="190" href="#190">190</a>         AncestorListener ancestorListener  = createAncestorListener(component, weakFocusListener);
<a class="jxr_linenumber" name="191" href="#191">191</a> 
<a class="jxr_linenumber" name="192" href="#192">192</a>         component.addAncestorListener(ancestorListener);
<a class="jxr_linenumber" name="193" href="#193">193</a>     }
<a class="jxr_linenumber" name="194" href="#194">194</a> 
<a class="jxr_linenumber" name="195" href="#195">195</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="196" href="#196">196</a> <em class="jxr_javadoccomment">     * Create the weak window focus listener.</em>
<a class="jxr_linenumber" name="197" href="#197">197</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="198" href="#198">198</a> <em class="jxr_javadoccomment">     * @param  windowFocusListener the focus listener</em>
<a class="jxr_linenumber" name="199" href="#199">199</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="200" href="#200">200</a> <em class="jxr_javadoccomment">     * @return the weak referenced listener.</em>
<a class="jxr_linenumber" name="201" href="#201">201</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="202" href="#202">202</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> WindowListener createWeakWindowFocusListener(WindowFocusListener windowFocusListener) {
<a class="jxr_linenumber" name="203" href="#203">203</a>         <strong class="jxr_keyword">final</strong> WeakReference&lt;WindowFocusListener&gt; weakReference = <strong class="jxr_keyword">new</strong> WeakReference&lt;WindowFocusListener&gt;(windowFocusListener);
<a class="jxr_linenumber" name="204" href="#204">204</a> 
<a class="jxr_linenumber" name="205" href="#205">205</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> WindowAdapter() {
<a class="jxr_linenumber" name="206" href="#206">206</a>             <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> windowActivated(WindowEvent e) {
<a class="jxr_linenumber" name="207" href="#207">207</a>                 <em class="jxr_comment">// TODO if the WeakReference's object is null, remove the</em>
<a class="jxr_linenumber" name="208" href="#208">208</a>                 <em class="jxr_comment">// WeakReference as a FocusListener.</em>
<a class="jxr_linenumber" name="209" href="#209">209</a>                 <strong class="jxr_keyword">if</strong> (weakReference.get() != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="210" href="#210">210</a>                     weakReference.get().windowGainedFocus(e);
<a class="jxr_linenumber" name="211" href="#211">211</a>                 }
<a class="jxr_linenumber" name="212" href="#212">212</a>             }
<a class="jxr_linenumber" name="213" href="#213">213</a> 
<a class="jxr_linenumber" name="214" href="#214">214</a>             <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> windowDeactivated(WindowEvent e) {
<a class="jxr_linenumber" name="215" href="#215">215</a>                 <strong class="jxr_keyword">if</strong> (weakReference.get() != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="216" href="#216">216</a>                     weakReference.get().windowLostFocus(e);
<a class="jxr_linenumber" name="217" href="#217">217</a>                 }
<a class="jxr_linenumber" name="218" href="#218">218</a>             }
<a class="jxr_linenumber" name="219" href="#219">219</a>         };
<a class="jxr_linenumber" name="220" href="#220">220</a>     }
<a class="jxr_linenumber" name="221" href="#221">221</a> 
<a class="jxr_linenumber" name="222" href="#222">222</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="223" href="#223">223</a> <em class="jxr_javadoccomment">     * Installs a listener on the given {@link JComponent}'s parent</em>
<a class="jxr_linenumber" name="224" href="#224">224</a> <em class="jxr_javadoccomment">     * {@link Window} that repaints the given component when the parent window's</em>
<a class="jxr_linenumber" name="225" href="#225">225</a> <em class="jxr_javadoccomment">     * focused state changes. If the given component does not have a parent at</em>
<a class="jxr_linenumber" name="226" href="#226">226</a> <em class="jxr_javadoccomment">     * the time this method is called, then an ancestor listener will be</em>
<a class="jxr_linenumber" name="227" href="#227">227</a> <em class="jxr_javadoccomment">     * installed that installs a window listener when the components parent</em>
<a class="jxr_linenumber" name="228" href="#228">228</a> <em class="jxr_javadoccomment">     * changes.</em>
<a class="jxr_linenumber" name="229" href="#229">229</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="230" href="#230">230</a> <em class="jxr_javadoccomment">     * @param component the {@code JComponent} to add the repaint focus listener</em>
<a class="jxr_linenumber" name="231" href="#231">231</a> <em class="jxr_javadoccomment">     *                  to.</em>
<a class="jxr_linenumber" name="232" href="#232">232</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="233" href="#233">233</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> installJComponentRepainterOnWindowFocusChanged(JComponent component) {
<a class="jxr_linenumber" name="234" href="#234">234</a>         <em class="jxr_comment">// TODO check to see if the component already has an ancestor.</em>
<a class="jxr_linenumber" name="235" href="#235">235</a>         WindowListener   windowListener   = createWeakWindowFocusListener(createRepaintWindowListener(component));
<a class="jxr_linenumber" name="236" href="#236">236</a>         AncestorListener ancestorListener = createAncestorListener(component, windowListener);
<a class="jxr_linenumber" name="237" href="#237">237</a> 
<a class="jxr_linenumber" name="238" href="#238">238</a>         component.addAncestorListener(ancestorListener);
<a class="jxr_linenumber" name="239" href="#239">239</a>     }
<a class="jxr_linenumber" name="240" href="#240">240</a> 
<a class="jxr_linenumber" name="241" href="#241">241</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="242" href="#242">242</a> <em class="jxr_javadoccomment">     * Create the ancestor listener.</em>
<a class="jxr_linenumber" name="243" href="#243">243</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="244" href="#244">244</a> <em class="jxr_javadoccomment">     * @param  component      the component.</em>
<a class="jxr_linenumber" name="245" href="#245">245</a> <em class="jxr_javadoccomment">     * @param  windowListener the listener.</em>
<a class="jxr_linenumber" name="246" href="#246">246</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="247" href="#247">247</a> <em class="jxr_javadoccomment">     * @return the weak referenced listener.</em>
<a class="jxr_linenumber" name="248" href="#248">248</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="249" href="#249">249</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> AncestorListener createAncestorListener(JComponent component, <strong class="jxr_keyword">final</strong> WindowListener windowListener) {
<a class="jxr_linenumber" name="250" href="#250">250</a>         <strong class="jxr_keyword">final</strong> WeakReference&lt;JComponent&gt; weakReference = <strong class="jxr_keyword">new</strong> WeakReference&lt;JComponent&gt;(component);
<a class="jxr_linenumber" name="251" href="#251">251</a> 
<a class="jxr_linenumber" name="252" href="#252">252</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> AncestorListener() {
<a class="jxr_linenumber" name="253" href="#253">253</a>             <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> ancestorAdded(AncestorEvent event) {
<a class="jxr_linenumber" name="254" href="#254">254</a>                 <em class="jxr_comment">// TODO if the WeakReference's object is null, remove the</em>
<a class="jxr_linenumber" name="255" href="#255">255</a>                 <em class="jxr_comment">// WeakReference as an AncestorListener.</em>
<a class="jxr_linenumber" name="256" href="#256">256</a>                 Window window = weakReference.get() == <strong class="jxr_keyword">null</strong> ? <strong class="jxr_keyword">null</strong> : SwingUtilities.getWindowAncestor(weakReference.get());
<a class="jxr_linenumber" name="257" href="#257">257</a> 
<a class="jxr_linenumber" name="258" href="#258">258</a>                 <strong class="jxr_keyword">if</strong> (window != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="259" href="#259">259</a>                     window.removeWindowListener(windowListener);
<a class="jxr_linenumber" name="260" href="#260">260</a>                     window.addWindowListener(windowListener);
<a class="jxr_linenumber" name="261" href="#261">261</a>                 }
<a class="jxr_linenumber" name="262" href="#262">262</a>             }
<a class="jxr_linenumber" name="263" href="#263">263</a> 
<a class="jxr_linenumber" name="264" href="#264">264</a>             <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> ancestorRemoved(AncestorEvent event) {
<a class="jxr_linenumber" name="265" href="#265">265</a>                 Window window = weakReference.get() == <strong class="jxr_keyword">null</strong> ? <strong class="jxr_keyword">null</strong> : SwingUtilities.getWindowAncestor(weakReference.get());
<a class="jxr_linenumber" name="266" href="#266">266</a> 
<a class="jxr_linenumber" name="267" href="#267">267</a>                 <strong class="jxr_keyword">if</strong> (window != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="268" href="#268">268</a>                     window.removeWindowListener(windowListener);
<a class="jxr_linenumber" name="269" href="#269">269</a>                 }
<a class="jxr_linenumber" name="270" href="#270">270</a>             }
<a class="jxr_linenumber" name="271" href="#271">271</a> 
<a class="jxr_linenumber" name="272" href="#272">272</a>             <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> ancestorMoved(AncestorEvent event) {
<a class="jxr_linenumber" name="273" href="#273">273</a>                 <em class="jxr_comment">// no implementation.</em>
<a class="jxr_linenumber" name="274" href="#274">274</a>             }
<a class="jxr_linenumber" name="275" href="#275">275</a>         };
<a class="jxr_linenumber" name="276" href="#276">276</a>     }
<a class="jxr_linenumber" name="277" href="#277">277</a> 
<a class="jxr_linenumber" name="278" href="#278">278</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="279" href="#279">279</a> <em class="jxr_javadoccomment">     * Create the repaint window listener.</em>
<a class="jxr_linenumber" name="280" href="#280">280</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="281" href="#281">281</a> <em class="jxr_javadoccomment">     * @param  component the component.</em>
<a class="jxr_linenumber" name="282" href="#282">282</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="283" href="#283">283</a> <em class="jxr_javadoccomment">     * @return the listener.</em>
<a class="jxr_linenumber" name="284" href="#284">284</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="285" href="#285">285</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> WindowFocusListener createRepaintWindowListener(<strong class="jxr_keyword">final</strong> JComponent component) {
<a class="jxr_linenumber" name="286" href="#286">286</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> WindowAdapter() {
<a class="jxr_linenumber" name="287" href="#287">287</a>             <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> windowActivated(WindowEvent e) {
<a class="jxr_linenumber" name="288" href="#288">288</a>                 component.repaint();
<a class="jxr_linenumber" name="289" href="#289">289</a>             }
<a class="jxr_linenumber" name="290" href="#290">290</a> 
<a class="jxr_linenumber" name="291" href="#291">291</a>             <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> windowDeactivated(WindowEvent e) {
<a class="jxr_linenumber" name="292" href="#292">292</a>                 component.repaint();
<a class="jxr_linenumber" name="293" href="#293">293</a>             }
<a class="jxr_linenumber" name="294" href="#294">294</a>         };
<a class="jxr_linenumber" name="295" href="#295">295</a>     }
<a class="jxr_linenumber" name="296" href="#296">296</a> 
<a class="jxr_linenumber" name="297" href="#297">297</a> }
</pre>
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